2000 excursion with trailer light issues

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Dec 27, 2025 | 01:06 PM

00excursions

Thread Starter

8th Gear

Joined: Dec 2024

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2000 excursion with trailer light issues

I have a 2000 xlt 6.8 v10 excursion. I recently ran into a issue with my work trailer. Long story short is I needed a new wire harness. After wiring it all up I have break and blinkers but no running lights. I do not understand why it's acting like this. I have checked the fuse under the hood. I do have a license plate light out I don't know if it's ran through that or not. Any suggestions on why I have blinkers and breaks but no running lights would be appreciated.

Dec 27, 2025 | 06:57 PM

Dweber85rc

Fleet Mechanic

Joined: Mar 2019

Posts: 1,293

Likes: 164

Check the ground on your trailer and/or get a wiring tester you can plug into the socket on the ex

Dec 27, 2025 | 09:23 PM

John in OkieLand

Lead Driver

Joined: Aug 2022

Posts: 5,094

Likes: 1,423

From: Oologah, OK

This Inline Tester is the Cat's Meow for figuring out "which way" the trouble is.

Inline 7 pin trailer light tester

and if you think it is forward of the connector, just get a new pigtail with connector

7 pin replacement harness w/connector

I always drill a hole and bolt a White Wire to the Bumper of the truck,
and do the same for the Trailer's frame.
use a Bullet push/pull connector to complete the circuit....

ball hitches "are not a ground", most have grease on them anyway.

Last edited by John in OkieLand; Dec 27, 2025 at 09:26 PM.

Dec 28, 2025 | 06:02 AM

Kirk Lavender

Trailering

Joined: Nov 2024

Posts: 20

Likes: 8

Trailer wiring issues are normally a ground problem! I always tell people to start with the ground wires first then check fuses. A tester is awesome and helpful. Good luck 👍

Dec 28, 2025 | 11:22 AM

00excursions

Thread Starter

8th Gear

Joined: Dec 2024

Posts: 8

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Quote:

Originally Posted by Dweber85rc

Check the ground on your trailer and/or get a wiring tester you can plug into the socket on the ex

so update, I hooked up my trailer to my other truck and everything works. So I need to find out why I have no trailer running lights on the x

Dec 28, 2025 | 11:23 AM

00excursions

Thread Starter

8th Gear

Joined: Dec 2024

Posts: 8

Likes: 0

Quote:

Originally Posted by Kirk Lavender

Trailer wiring issues are normally a ground problem! I always tell people to start with the ground wires first then check fuses. A tester is awesome and helpful. Good luck 👍

so it's not the trailer itself. I hooked it up to my f250 and everything worked, so its something wrong with the x it's self.

Dec 28, 2025 | 11:26 AM

00excursions

Thread Starter

8th Gear

Joined: Dec 2024

Posts: 8

Likes: 0

Quote:

Originally Posted by John in OkieLand

This Inline Tester is the Cat's Meow for figuring out "which way" the trouble is.

Inline 7 pin trailer light tester

and if you think it is forward of the connector, just get a new pigtail with connector

7 pin replacement harness w/connector

I always drill a hole and bolt a White Wire to the Bumper of the truck,
and do the same for the Trailer's frame.
use a Bullet push/pull connector to complete the circuit....

ball hitches "are not a ground", most have grease on them anyway.

this is my plan if attack today, as i figired out its not the trailer and is the truck as i hooked this up to f250 and everything worked. Which would lead me to belive its the hookup on the excursion.